Milking-machine.



J. L. HULBERT.

MILKING MACHINE.

APPLIOATION FILED JUNE 3o, 1911.

Patented Aug. 12, 1913.

WIT/VESSES: Mm. (if, WM

J. L. HULBERT.

MILKING MACHINE. APPLICATION FILED JUNEao, 1911.

Patented Aug. 12, 1913.

2 SHEETS-SHEET 2.

/NvEA/ro/r @4L M; www1 COLUMBIA PLANOGRAPH C0., WASHINGTON. D. c.

UNITED STATES PATENT OFFIQE.

JOHN L. HULBLERT, OF POUGI-IKEEPSIE, NEW YORK, ASSIGNOR TO THE DE LAVALSEPARATOR COMPANY, A CORORATION OF NEW JERSEY. i

MILKING-MACHINE.

To all whom t may concern.'

Be it known that I, JOHN L. I-IULBERT, a citizen of the United States,residing at Poughkeepsie, county of Dutchess, and State of New York,have invented a new and useful Improvement in Milking-Wlachines, ofwhich the following is a full, clear, and exact description, referencebeing had to the accompanying drawings, which Jform a part ot thisspecification.

My invention relates to certain improvements in milking machines wherebytheir effectiveness is increased.

I will first describe the embodiment of my invention shown in theaccompanying drawings, and then point out the invention in the claims.

In the drawings: Figure 1 is a View, partially in section, of anapparatus involving my invention, taken on the line 1 1, Fig. 3. Fig. 2is a sectional view of a part o Fig. 1 taken on the line 2 2 Figs. 3 and5; Fig. 3 is a section on the line 3 3, Fig. Q.; Fig. 4 is a view ofpart of apparatus of Fig. l; Fig. 5 is a section on line 5 5; Fig. Q;Fig. 6 is an enlarged detail `sectional view of a portion of Fig. 1;Fig. 7 is a section on line 7 7, Fig. 6.

a are the teat cups proper having the conical extensions Z) surroundingthe discharge portion of the teat connected with a flexible pipe cleading to the milk receiving chamber (Z.

e is the outlet from the milk receiving chamber leading to the milkreceptacle, not shown. This pipe c is constantly under suction,producing a partial vacuum in the milk receiving' chamber, the pipeconnection between the conical ends of the Jteat cups and the milkreceiving chamber, and in the conical ends ot the teat cups. The teatcups have linings forming between them and the wall of the cup a a.cushion chamber in which are the inflatable cushions.

g are inlets to these cushions connected by flexible pipes 26 with thepassage 16 in the valve casing.

11 is a passage leading from the valve casing to the conical dischargeportion of the teat. cup. Intermittently air is admitted to the teat cupproper iniating the cushions,

Specification of Letters Patent.

Application filed June 30, 1911.

Patented aug. 12,1913. Serial N0. 636,145.

and exhausted from the teat cup proper to the conical .extension of theteat cup. This i I accomplish in the following' manner: 2 is a chamberhaving the port 3 controlled by the inwardly opening valve 4: and alsohaving the exhaust port 5. In this chamber is the piston (5 kconnectedto the rod 7. This piston has a slot 8 through which passes a pin 9()connected to the valve proper 18. 9 is the pressure inlet leading from asource of pressure supply, not shown, and terminating in the annularchamber 10. 11 is a passage leading from the port 12 to the conicallower portion Zi of the teat cups. 13 is a passage in the valve proper18. 14 is a passage in the' valve proper 18, and 15 isa constrictedspace between the piston rod and its bushing. 16 are passages in thevalve casing connecting through tube 26 with the cushion chambers of theteat cups a.

In the position shown in Fig. 1, the pressure supply is connected withthe pipe leading to the cushion chambers of the teat cups and also totop of piston 6. lVhen the pres- .sure is sufficient on top of piston 6to move it, it and its rod 7 descend. After moving the length of theslot 8 they carry the valve 18 with them. This downward movement isretarded by the compression of air below the piston 6 until passage 17connects with port 5 and allows the air to escape. The piston then makesa quick downward movement carrying the valve 18 past the lap position.'The passage 13 connects 16 and 11 (see Fig. 4L), and the air in theinflatable cushion chamber exhausts into the conical Adischarge portionsof the teat cups.

The upper portion of chamber 2 above the piston 6 through passages 14,15 and 11 is connected with the conical discharge portion of the teatcups, and it being constantly under suction, the air in said portion ofthe chamber exhausts therethrough. Ill/*hen the air above the piston isexhausted, the valve is allowed to lift, admitting air through the ports3, and the piston is lifted. The first upward movement of the piston isa free movement ot the rod 7, which, at the end of its free movement,cuts o the connection ot passages 13 and 14 with passages I1 andconnects the pressure supply with passage lll, which admits air belowthe valve quickly, liittingl the valve by the air, and admits air slowlyto the top of piston. Air pressure is also admitted through passage 1Gto the cushion chambers. rllhe admission of air rapidly below the valveand slowly above the piston, enables the valve to be rapidly raised toits ultimate position, while the pressure above the piston is slowlyaccumulatin to a point sntlicient to cause the piston to descend. Y

ln an application tiled of even date herewith, Serial No. 030,144, Ihave described and illustrated the machine herein described andillustrated and also a machine of a ditterentspeciiic construction andhave therein laid broad claims to the invention common to both machines,the claims in this case beingl confined to features specific to themachine herein descril'ied and illustrated. Nor do l herein claim themethod herein described` as the saine forms the subject matter otLetters Patent issued to me October 29, 1912, No. 1,043,013, theapplication for which is a division oi said application Serial No.630,144.

Having now fully described my invention, what l claim and desire toprotect by Letters Patent is:

l. ln a milking machine, in combination, a teat cup having an upperport-ion containing an inflatable cushion, and a lower portion adaptedto surround the milk discharge portion o'l3 the teat, means tointermittently admit pressure to the inflatable cushion chamber, and toexhausttherefrom to the lower portion of the teat cup.

2. ln a milking machine, in combination, a teat cup having an upperportion containing an intlatable cushion, and a lower portion adapted tosurround the milk discharge portion ot the teat, means to intermittentlyadmit pressure to the inflatable cushion chamber and to exhausttherefrom t-o the lower portion of the teat cup, and means to maintainsuction on the lower portion of the teat cup.

El. ln a milking machine, in combination, a teat cup having an upperportion containing an inflatable cushion and a lower portion adapted tosurround the milk discharge portion of the teat, a valve and valvechamber', there being a passage to the valve casing 'from a source ofpressure supply, and passages leading respectively to the inflatablecushion chamber, and lower portion of the teat cup, the valve in itsmovement alternately connecting the passage to the inflatable chamberwith the source of pressure supply and with the passage to the lowerportion oi' the teat cup.

at. ln a milking machine, in combination, a teat cup having an upperportion containing an inilatable cushion and a lower portion adapted tosurround the milk discharge portion of the teat, a valve and valvechamber, there being a passage to the valve :asing from a source ofpressure supply, and passages leading respectively to the inflatablecushion chamber and lower portion of the teal' cup, the valve in itsmovement alternately connecting the passage to the inflatable chamberwith the source of pressure supply and with the 'passage to the lowerportion of the teat cup, and means to maintain suction on the lowerportion of the teat cup.

5. Thecombination with the teat cnp,having the inllatable cushion andthe lower portion surrounding the discharge portion of the teat, thevalve casing and passages leading respectively from the cushion chamberand lower portion of teat cup, and'from a source of pressure supply tothe valve casing, of a valve, there being a passage in said valveleading to the space below the valve, the valve in its movementconnecting alternately the passage to the inflatable chamber with thepressure supply and with the lower portion of teat cup, and connectingthe pressure supply passage with the lower portion of valve, and meansto initially move said valve.

G. rlhe combination with the teat cup, having the inflatable cushion andthe lower portion surrounding` the discharge portion of the teat, thevalve casing and passages leading respectively from the cushion chamberand lower portion of teat cup, and from a source ot pressure supply tothe valve casing, of a valve comprising a valve proper and piston androd, slot and pin connection between the piston rod and valve proper, achamber in which the piston travels, means in the movement of the valveproper to admit pressure to the top oi the piston and exhaust pressuretherefrom, said means including a passage in said valve leading to thelower portion of the valve, the valve in its movement connectingalternately the passage to the inflatable chamber with the pressuresupply and with the lower portion of teat cup and connecting' thepressure supply passage with the lower portion of valve.

7. The combination with the teat cup, having the inliatable cushion andthe lower portion surrounding` the discharge portion of the teat, thevalve casing and passages leading respectively from the cushion chamberand lower portion of teat cup, and a source ot pressure supply to thevalve casing, of a valve comprising a, valve proper and a piston androd, slot and pin connection between the piston rod and valve proper, achamber in which the piston travels. a constricted passage leading inone position of the valve from the pressure passage to the top oitl thepiston, and in the other position connecting the to'p of the piston Withsaid passage from the lower hereunto set my hand, at Philadelphia, onportion of the teat cup, the valve in its this 28th clay of June, 1911.movement connecting alternately the passage to the inflatable chamberwith the pres- JOHN L' HULBERT 5 sure supply and with the passage to theWitnesses:

lower portion of teat cup. M. M. HAMILTON,

In testimony of which invention, I have E. E. WALL.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents, Washington, D. G.

